package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

/**
 * 订单
 */
@Service
@Slf4j
public class OrderServiceImpl implements OrderService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;

    @Autowired
    private WebSocketServer webSocketServer;


    /**
     * 再来一单
     * @param id
     */
    @Override
    public void repetition(Long id) {
        Orders orders = orderMapper.selecOrderById(id);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(null);
        orders.setPayMethod(0);
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());
        orderMapper.insert(orders);
        orderDetailList.forEach( item -> {
            item.setOrderId(orders.getId());
        });
        orderDetailMapper.insertBatch(orderDetailList);
    }

    /**
     * 用户催单
     * @param id
     */
    @Override
    public void reminder(Long id) {
        sendReminderMessageToClient(id);
    }

    /**
     * 向客户端发送催单提醒
     */
    private void sendReminderMessageToClient(Long id) {
        HashMap<Object, Object> map = new HashMap<>();
        map.put("type" , 2);
        map.put("orderId" , id);
        Orders order =  orderMapper.selecOrderById(id);
        map.put("content" , "订单号:" + order.getNumber());
        String message = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(message);
    }

    /**
     * 历史订单查询
     * @param ordersPageQueryDTO
     */
    @Override
    public Result<PageResult> historyOrders(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage() , ordersPageQueryDTO.getPageSize());
        Page<Orders> page = orderMapper.selectOrderByCondition(ordersPageQueryDTO);
        List<Orders> result = page.getResult();

        List<OrderVO> orderVOList = new ArrayList<>();

        result.forEach( item -> {
            OrderVO orderVO = new OrderVO();
            BeanUtils.copyProperties(item , orderVO);
            List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(item.getId());
            orderVO.setOrderDetailList(orderDetailList);
            orderVOList.add(orderVO);
        });

        PageResult pageResult = new PageResult();
        pageResult.setTotal(page.getTotal());
        pageResult.setRecords(orderVOList);
        return Result.success(pageResult);
    }

    /**
     * 订单完成
     * @param id
     */
    @Override
    public void complete(Long id) {
        Orders orders = Orders.builder()
                .id(id)
                .status(Orders.COMPLETED)
                .deliveryTime(LocalDateTime.now())
                .build();
        orderMapper.update(orders);
    }

    /**
     * 取消订单
     * @param ordersCancelDTO
     */
    @Override
    public void cancel(OrdersCancelDTO ordersCancelDTO) {
        Orders orders = Orders.builder()
                .id(ordersCancelDTO.getId())
                .status(Orders.CANCELLED)
                .cancelTime(LocalDateTime.now())
                .cancelReason(ordersCancelDTO.getCancelReason())
                .build();
        orderMapper.update(orders);
    }

    /**
     * 拒单
     * @param ordersRejectionDTO
     */
    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) {
        Orders order = Orders.builder()
                .id(ordersRejectionDTO.getId())
                .rejectionReason(ordersRejectionDTO.getRejectionReason())
                .status(Orders.CANCELLED)
                .build();
        orderMapper.update(order);
    }

    /**
     * 派单
     * @param id
     */
    @Override
    public void delivery(Long id) {
        Orders order = Orders.builder()
                .id(id)
                .status(4)
                .build();
        orderMapper.update(order);
    }

    /**
     * 接单
     * @param id
     * @return
     */
    @Override
    public Result confirm(Long id) {
        Orders order = Orders.builder()
                .id(id)
                .status(Orders.CONFIRMED)
                .build();
        orderMapper.update(order);
        return Result.success();
    }

    /**
     * 各订单状态数量统计
     * @return
     */
    @Override
    public Result statistics() {
        // 待派送数量
        Integer confirmedCount = orderMapper.selectConfirmedOrder();
        // 派送中数量
        Integer deliveryInProgress = orderMapper.selectDeliveryInProgressOrder();
        Integer selectToBeConfirmedOrder = orderMapper.selectToBeConfirmedOrder();
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setConfirmed(confirmedCount);
        orderStatisticsVO.setToBeConfirmed(selectToBeConfirmedOrder);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return Result.success(orderStatisticsVO);
    }

    /**
     * 查询订单详情
     * @param id
     * @return
     */
    @Override
    public Result orderDetail(Long id) {
        Orders  orders = orderMapper.getById(id);
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());
        OrderVO orderVO = new OrderVO();
        orderVO.setOrderDetailList(orderDetailList);
        BeanUtils.copyProperties(orders , orderVO);
        return Result.success(orderVO);
    }

    /**
     * 条件搜索
     * @param ordersPageQueryDTO
     * @return
     */
    @Override
    public Result conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage() , ordersPageQueryDTO.getPageSize());
        Page<Orders> pages =  orderMapper.selectOrderByCondition(ordersPageQueryDTO);
        PageResult pageResult = new PageResult();
        pageResult.setRecords(pages.getResult());
        pageResult.setTotal(pages.getTotal());
        return Result.success(pageResult);
    }

    /**
     * 用户下单
     *
     * @param ordersSubmitDTO
     * @return
     */
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //异常情况的处理（收货地址为空、购物车为空）
        AddressBook addressBook = addressBookMapper.selectAddressById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null) {
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);

        //查询当前用户的购物车数据
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.selectShoppingCartListByUserId(shoppingCart.getUserId());
        if (shoppingCartList == null || shoppingCartList.size() == 0) {
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        User user = userMapper.getById(userId);

        //构造订单数据
        Orders order = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,order);
        order.setPhone(addressBook.getPhone());
        order.setAddress(addressBook.getDetail());
        order.setConsignee(addressBook.getConsignee());
        order.setNumber(String.valueOf(System.currentTimeMillis()));
        order.setUserId(userId);
        order.setStatus(Orders.PENDING_PAYMENT);
        order.setPayStatus(Orders.UN_PAID);
        order.setOrderTime(LocalDateTime.now());
        order.setUserName(user.getName());
        order.setDeliveryStatus(ordersSubmitDTO.getDeliveryStatus());
        if (ordersSubmitDTO.getTablewareStatus() == 1) {
            order.setTablewareStatus(1);
        } else {
            order.setTablewareNumber(ordersSubmitDTO.getTablewareNumber());
        }


        //向订单表插入1条数据
        orderMapper.insert(order);

        //订单明细数据
        List<OrderDetail> orderDetailList = new ArrayList<>();
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(order.getId());
            orderDetailList.add(orderDetail);
        }

        //向明细表插入n条数据
        orderDetailMapper.insertBatch(orderDetailList);

        //清理购物车中的数据
        shoppingCartMapper.deleteAllByUserId(userId);

        //封装返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(order.getId())
                .orderNumber(order.getNumber())
                .orderAmount(order.getAmount())
                .orderTime(order.getOrderTime())
                .build();

        return orderSubmitVO;
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
/*        JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));*/

        paySuccess(ordersPaymentDTO.getOrderNumber());
        sendMessage(ordersPaymentDTO.getOrderNumber());
        return null;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);
    }

    /**
     * 向商家发送订单消息提醒
     * @param orderNumber
     */
    private void sendMessage(String orderNumber) {
        HashMap<Object, Object> map = new HashMap<>();
        map.put("type" , 1);
        map.put("content" , "订单号" + orderNumber);
        Orders order = orderMapper.getByNumber(orderNumber);
        map.put("orderId" , order.getId());
        String message = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(message);
    }
}
